Athletes competing at the London 2012 Olympic Games have been banned from wearing headphones made by anyone other than official partnerPanasonic. This includes members of Team GB, who have been spotted during the live broadcasts sporting British-themed Beats by Dr Dre headsets.

Tom Daley was seen wearing a pair before his first diving medal attempt, while Team GB’s goalkeeper Jack Butland tweeted his love for the brand. Female tennis player Laura Robson also allegedly tweeted about her Beats, but withdrew the posting soon after.

Now, British Olympic Association spokesperson Darryl Siebel has said that officials have reminded team leaders of “the importance of protecting our corporate partners” and pointed out that rules are in place that prevent competitors from promoting commercial products and brands during the Olympic Games.

The International Olympic Committee has a rule, rule 40, which allows organisers to disqualify competitors who promote their own sponsors, either on the field of play or online. It is believed that the field of play also includes the area behind starting blocks in the Aquatics Centre, for example.

As some competitors need to listen to music or recordings as part of their preparations, Siebel is urging Team GB athletes to switch to sponsorPanasonic‘s devices instead.